EP 1084093 A1 20010321 - PROCESSES FOR THE PRODUCTION OF HEXAFLUOROPROPENE AND OPTIONALLY OTHER HALOGENATED HYDROCARBONS CONTAINING FLUORINE
Title (en)
PROCESSES FOR THE PRODUCTION OF HEXAFLUOROPROPENE AND OPTIONALLY OTHER HALOGENATED HYDROCARBONS CONTAINING FLUORINE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON HEXAFLUORPROPEN UND GEGEBENENFALLS WEITEREN HALOGENIERTEN FLUOR ENTHALTENDEN KOHLENWASSERSTOFFEN
Title (fr)
PROCEDES RELATIFS A LA PRODUCTION D'HEXAFLUOROPROPENE ET EVENTUELLEMENT D'AUTRES HYDROCARBURES HALOGENES CONTENANT DU FLUOR
Publication
Application
Priority
- US 9912246 W 19990602
- US 8775198 P 19980602
Abstract (en)
[origin: WO9962851A1] A process is disclosed for the manufacture of CF3CF=CF2, and optionally a least one compound selected from CF3CH2CF3 and CF3CHFCHF2. The process involves contacting a reactor feed including a precursor stream of at least one halogenated propane of the formula CX3CH2CHyX(3-y) and/or halogenated propene of the formula CX3CH=CHyX(2-y), where each X is Cl or F and y is 0, 1 or 2 (provided that the average fluorine content of the precursor stream is no more than 5 fluorine substituents per molecule) with HF and Cl2 in a chlorofluorination reaction zone containing a fluorination catalyst and operating at a temperature between about 150 DEG C and 400 DEG C, to produce a reaction zone effluent including HF, HCl and a mixture of reaction products of the precursor feed which contains at least one compound of the formula C3Cl2F6 including CClF2CClFCF3 and at least one compound of the formula C3HClF6, including CHF2CClFCF3 and has an average fluorine content which is at least one fluorine substituent per molecule more than the average fluorine content of the precursor stream. The chlorofluorination reaction zone effluent is distilled to produce (i) a low-boiling component including HCl (and when they are present in the reaction zone effluent, C3F8, C3ClF7 and C3HF7), (ii) a hydrogenation feed component containing at least one compound of the formula C3Cl2F6 including CClF2CClFCF3 and at least one compound of the formula C3HClF6 including CHF2CClFCF3, and (iii) an underfluorinated component including halogenated propanes containing at least one chlorine subtituent and from one to five fluorine substituents. The CClF2CClFCF3 and CHF2CClFCF3 of hydrogenation feed component (ii) is reacted with hydrogen to produce a mixture including CF3CF=CF2 and CF3CHFCHF2 and the CF3CF=CF2 from this product mixture is recovered. Underfluorinated component (iii) is returned to the chlorofluorination reaction zone.
IPC 1-7
IPC 8 full level
C07C 17/00 (2006.01); C07C 17/10 (2006.01); C07C 17/20 (2006.01); C07C 17/23 (2006.01); C07C 17/383 (2006.01); C07C 19/08 (2006.01); C07C 21/18 (2006.01)
CPC (source: EP US)
C07C 17/00 (2013.01 - EP US); C07C 17/206 (2013.01 - EP US); C07C 17/23 (2013.01 - EP US); C07C 19/08 (2013.01 - EP US); C07C 21/18 (2013.01 - EP US)
Citation (search report)
See references of WO 9962851A1
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
WO 9962851 A1 19991209; CA 2333472 A1 19991209; CA 2333472 C 20081216; CN 1178883 C 20041208; CN 1304395 A 20010718; DE 69919536 D1 20040923; DE 69919536 T2 20050901; EP 1084093 A1 20010321; EP 1084093 B1 20040818; JP 2002516888 A 20020611; US 6329559 B1 20011211
DOCDB simple family (application)
US 9912246 W 19990602; CA 2333472 A 19990602; CN 99806906 A 19990602; DE 69919536 T 19990602; EP 99928367 A 19990602; JP 2000552066 A 19990602; US 70144800 A 20001127